//Mở cửa sổ mới
function Popup(address, name, width, height) {
    window.open(address,name,'Width='+width+', Height='+ height +',resizable=no, scrollbars=yes,toolbar=no, location=no, directories=no, status=yes, menubar=no, top=100, left=400');
}

function Appear(id) {
    document.getElementById(id).style.display = 'block';
}
function Hide(id) {
    document.getElementById(id).style.display = 'none';
}